"rebake old posts count" option is a bit confusing

[codinghorror (Jeff Atwood)]

Can we perhaps hide this setting altogether? It seems sooo rare that anyone would need to mess with it at all, and it’s so very specialized. A setting you only (maybe?) need to adjust every few years

@Alex_P

so far there was only one such case in 2017

I vote we pull this setting out and be done?